Look for Thai Kitchens. I think they are available nationwide. The packages contain rice noodles and a set of seasoning packets that are added after the noodles are simmered for 3-4 minutes. The hot/sour, i.e. Tom Yum, and also Coconut Curry are excellent. I used to bring the water to where bubbles were starting to rise from the bottom of the pan, add chunks of trout, bring to a simmer, cook for a couple of minutes, add noodles, cook until tender(~4 minutes at 10,500-11,000'), add seasoning packets, stir, and enjoy. I seldom cook and never fish anymore, but back in the day those two dishes were gourmet food to a hungry backpacker. I still see the products on the shelf up here, so you should be able to find them down your way.